3107mm2= ............cm2
38m225dm2= ............................dm2 15dm29cm2 = ..............................cm2 10cm26mm2=..............................mm2 5hm230m2= ..............................m2 198cm2= ...........................dm2 ......................cm2 2080dm2=....................m2 ....................dm2 3107mm2= ..................cm2 ...................mm2 45908 m2 = .................hm2 ...............dam2 ........
viết tiếp vào chỗ chấm:
1065 dm=...m...dm
2080m = .... km ....m
1256 g =.... kg....g
3107mm2=...cm2...mm2
Bài 6: Đổi các số đo diện tích sau:
25m22500cm2= ............................dm2 15m29dm2 = ..............................cm2 10dm26mm2=..............................mm2 7km230m2= ..............................m2 58989cm2= .......... m2......... dm2..........cm2 2080dm2=....................m2....................dm2 3107mm2= ................cm2...................mm2 45908 m2 =........hm2...............dam2........m2
25m2 2500cm2= ..2525....dm2
15m2 9dm2 = ..150900...cm2
10dm2 6mm2=...10006...mm2
7km2 30m2= ....7000030..m2
58989cm2= ..5,8... m2.....9,8.... dm2.....9.....cm2
2080dm2=....20..m2...80..dm2
3107mm2= ...31..cm2...7....mm2
45908 m2 =.....4,5...hm2..9..dam2....8...m2
25m22500cm2= ..............2525..............dm2 15m29dm2 = ..........150900....................cm2 10dm26mm2=..............10006................mm2 7km230m2= .................7000030.............m2 58989cm2= ....58...... m2......98... dm2........9..cm2 2080dm2=......20..............m2.............80.......dm2 3107mm2= .......31.........cm2.........8..........mm2 45908 m2 =...45.....hm2...........9....dam2...8.....m2
Tính nhẩm:
a) 15 cm2 + 20 cm2 = ..................
60 cm2 - 42 cm2 = ..................
20 cm2 + 10 cm2 + 15 cm2 = ..................
b) 12 cm2 x 2 = ..................
40 cm2 : 4 = ..................
50 cm2 - 40 cm2 + 10 cm2 = ..................
a) 15 cm2 + 20 cm2 = 35 cm2
60 cm2 - 42 cm2 = 18 cm2
20 cm2 + 10 cm2 + 15 cm2 = 45 cm2
b) 12 cm2 x 2 = 24 cm2
40 cm2 : 4 = 10 cm2
50 cm2 - 40 cm2 + 10 cm2 = 20 cm2
Viết số thích hợp vào chỗ chấm:
a) 4 m2 = …… cm2 m2 = ……dm2
16 m2 = …… dm2 dm2 = …… cm2
308 dm2 = …… cm2 m2 = …… cm2
b) 700 cm2 = …… dm2 15 m2 9 dm2 = …… dm2
3400 dm2 = …… m2 7 dm2 25 cm2 = …… cm2
50 000 cm2 = …… m2 28 m2 50 cm2 = …… cm2
c) 948 dm2 = …… m2 …… dm2 8791 dm2 = …… m2 …… dm2
705 cm2 = …… dm2 …… cm2 30 045 cm2 = …… m2 …… cm2
a) 4 m2 = 40000 cm2 m2 = 50dm2
16 m2 = 1600 dm2 dm2 = 50 cm2
308 dm2 = 30800cm2 m2 = 100 cm2
b) 700 cm2 = 7 dm2 15 m2 9 dm2 = 1509 dm2
3400 dm2 = 34 m2 7 dm2 25 cm2 = 725 cm2
50 000 cm2 = 5 m2 28 m2 50 cm2 = 280050 cm2
c) 948 dm2 = 9 m2 48 dm2 8791 dm2 = 87 m2 91 dm2
705 cm2 = 7 dm2 5cm2 30 045 cm2 = 3 m2 45 cm2
a 4 m2 =40000 cm2
b 1/2 m2 =50 dm 2
Điền dấu >, = , <
210 c m 2 ….2 d m 2 10 c m 2
1954 c m 2 …..19 d m 2 50 c m 2
6 d m 2 3 c m 2 ….603 c m 2
2001 c m 2 ….20 d m 2 10 c m 2
210 c m 2 = 2 d m 2 10 c m 2
1954 c m 2 > 19 d m 2 50 c m 2
6 d m 2 3 c m 2 = 603 c m 2
2001 c m 2 < 20 d m 2 10 c m 2
a) =
b) >
c) =
d) <
210 c m 2 = 2 d m 2 10 c m 2
1954 c m 2 > 19 d m 2 50 c m 2
6 d m 2 3 c m 2 = 603 c m 2
2001 c m 2 < 20 d 2 10 c m 2
8 cm2 + 5 cm2 9 cm2 x 3
37 cm2 – 20 cm2 36 cm2 : 4
\(8cm^2+5cm^2=13cm^2\)
\(9cm^2\times3=27cm^2\)
\(37cm^2-20cm^2=17cm^2\)
\(36cm^2:4=9cm^2\)
Số?
a) 3 dm2 = cm2 300 cm2 = dm2
b) 6 dm2 = cm2 600 cm2= dm2 6 dm 250 cm2 = cm2
a) 3 dm2 = 300 cm2
300 cm2 = 3 dm2
b) 6 dm2 = 600 cm2
600 cm2 = 6 dm2
6 dm2 50 cm2 = 650 cm2
Tính (theo mẫu).
Mẫu: 2 cm2 + 3cm2 = 5cm2 5 cm2 x 2 = 10cm2
a) 37 cm2 + 25 cm2 50 cm2 – 12 cm2
b) 15 cm2 x 4 56 cm2 : 7
a) 37 cm2 + 25 cm2 = 62 cm2 | b) 15 cm2 x 4 = 60 cm2 |
50 cm2 – 12 cm2 = 38 cm2 | 56 cm2 : 7 = 8 cm2 |
Điền số thích hợp:
20dm2 5 cm2 = ….. cm2
700 dm2 = …..cm2
605dm2 = ….m2….cm2 b) 230 dm2 = …..cm2
60dm2 = …. cm2
380m2 = ….dm2