52+68+91+82+64
a) 25 .64 +25 . 36 – 109
b) 180 : ( 4 . 52 – 82)
c) 610 : 68+32. 20200
d) (–15).4 – 15
1 * 2 * 3 * 4 * 5 * 6 * 7 * 8 * 9 * 10 * 11 * 12 * 13 * 14 * 15 * 16 * 17 * 18 * 19 * 20 * 21 * 22 * 23 * 24 * 25 * 26 * 27 * 28 * 29 * 30 * 31 * 32 * 33 * 34 * 35 * 36 * 37 * 38 * 39 * 40 * 41 * 42 * 43 * 44 * 45 * 46 * 47 * 48 * 49 * 50 * 51 * 52 * 53 * 54 * 55 * 56 * 57 * 58 * 59 * 60 * 61 * 62 * 63 * 64 * 65 * 66 * 67 * 68 * 69 * 70 * 71 * 72 * 73 * 74 * 75 * 76 * 77 * 78 * 79 * 80 * 81 * 82 * 83 * 84 * 85 * 86 * 87 * 88 * 89 * 90 * 91 * 92 * 93 * 94 * 95 * 96 * 97 * 98 * 99 * 100 bằng bao nhiêu?
TÍNH NHANH
19 + 28 + 37 + 46 + 64 + 73 + 82 + 91
Nhóm vào:
= (19 +91) + (28+82) + (37+73) + (46+64)
= 110 + 110 + 110 + 110
= 110 x 4
= 440
19 + 28 + 37 + 46 + 64 + 73 + 82 + 91
=(19+91)+(28+82)+(37+73)+(46+64)
=110 + 110 + 110 +110
=110X4
=440
Nhóm vào:
= (19 +91) + (28+82) + (37+73) + (46+64)
= 110 + 110 + 110 + 110
= 110 x 4
= 440
16 + 54 + 82 + 68 + 23+ 57 + 91 +59 + 60 + 70 = ?
kb... ( mk ko tick câu này)
( 16 + 54 ) + ( 82 + 68 ) + ( 23 + 57 ) + ( 91 + 59 ) + ( 60 + 70 )
= 70 + 150 + 80 + 150 + 130
= 580
Học tốt nha !!
16 + 54 + 82 + 68 + 23 + 57 + 91 + 60 + 70
= 580
học tốt ^_^
16 + 54 + 82 + 68 + 23+ 57 + 91 +59 + 60 + 70
= 70 + 82 + 68 + 23+ 57 + 91 +59 + 60 + 70
= 152 + 68 + 23+ 57 + 91 +59 + 60 + 70
= 220 + 23 + 57 + 91 +59 + 60 + 70
= 243 + 57 + 91 + 59 + 60 + 70
= 300 + 91 + 59 + 60 + 70
= 391 + 59 + 60 + 70
= 450 + 60 + 70
= 510 + 70
= 580
tính
18/31x62/9
35/72x63/20
34/65: 17/15
111/64: 37/40
12/19x41/52:82/19
\(\dfrac{18}{31}\times\dfrac{62}{9}\)
\(=\dfrac{18\times62}{31\times9}\)
\(=\dfrac{2\times2}{1}\)
\(=4\)
==============
\(\dfrac{35}{72}\times\dfrac{63}{20}\)
\(=\dfrac{35\times63}{72\times20}\)
\(=\dfrac{7\times7}{8\times4}\)
\(=\dfrac{49}{32}\)
===============
\(\dfrac{34}{65}:\dfrac{17}{15}\)
\(=\dfrac{34}{65}\times\dfrac{15}{17}\)
\(=\dfrac{34\times15}{65\times17}\)
\(=\dfrac{2\times3}{13\times1}\)
\(=\dfrac{6}{13}\)
===========
\(\dfrac{111}{64}:\dfrac{37}{40}\)
\(=\dfrac{111}{64}\times\dfrac{40}{37}\)
\(=\dfrac{111\times40}{64\times37}\)
\(=\dfrac{3\times5}{8\times1}\)
\(=\dfrac{15}{8}\)
=============
\(\dfrac{12}{19}\times\dfrac{41}{52}:\dfrac{82}{19}\)
\(=\dfrac{12}{19}\times\dfrac{41}{52}\times\dfrac{19}{82}\)
\(=\dfrac{12\times41\times19}{19\times52\times82}\)
\(=\dfrac{3\times1\times1}{1\times13\times2}\)
\(=\dfrac{3}{26}\)
82+78+74+70+66+2+6+10-64-68-72-76-80-4-8
Hay nêu điểm chung của các số sau :1, 7, 10, 13, 19, 23, 28, 31, 32, 44, 49, 68, 70, 79, 82, 86, 91, 94, 97, 100
7=4+3*1
10=4+3*2
....................
nho nhan chia truoc cong tru sau
7680 chia 64
4674 chia 82
7318 chia 36
18408 chia 52
đặt tính ròi tính nha các bạn
7680:64=120
4674:82=57
7318:36=chia ko được bạn xem lại bài nhe
18408:52=354
chúc bạn học tốt
a) 7680:64=120
b) 4674:82=57
d)18408:52=354
Tính nhanh
12 × 68 + 16 × 256
103,7 × 101 - 103 - 0,7
81,3 × 99 + 82 - 0,7
17,4 × 52 + 57 × 14,7 - 14,7 × 9
14,2 × 30 + 14,2 × 57 + 14,2 × 13
a)=4876
b)=10370
c)=8130
d)=1610.4
e)=1420
nho k day
12 × 68 + 16 × 256 = 4876
103,7 × 101 - 103 - 0,7 = 10370
81,3 × 99 + 82 - 0,7 = 8130
17,4 × 52 + 57 × 14,7 - 14,7 × 9 = 1610,4
14,2 × 30 + 14,2 × 57 + 14,2 × 13 = 1420
k mình nha