a) 7 x 6 + 18 = 42 + 18
= 60
b) 7 x 3 + 29 = 21 + 29
= 50
c) 7 x 10 + 40 = 70 + 40
= 110
d) 7 x 8 + 38 = 56 + 38
= 94
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Tínha) 6 x 4 + 30 .............. ..............b) 6 x 8 – 18 .............. ..............c) 6 x 7 + 22 .............. ..............d) 6 x 10 – 25 .............. ..............
Đọc tiếp
Tính
a) 6 x 4 + 30 = ..............
= ..............
b) 6 x 8 – 18 = ..............
= ..............
c) 6 x 7 + 22 = ..............
= ..............
d) 6 x 10 – 25 = ..............
= ..............
Tính:
a) 6 x 7 + 8 = ......,
= ......,
b) 6 x 4 x 2 = ......,
= ......,
c) 6 x 5 x 3 = ......,
= ......,
d) 6 x 8 – 18 = ......,
= ......,
a .(18 – 9 x 2) x (2 + 4 + 6 + 8 + 10)b.(7 x 8 – 56 ) : (2 + 4 + 6 + 8 + 112)c. (2 + 125 + 6 + 145 + 112) x (42 – 6 x 7)d.(12 x 6 – 12 x 4 – 12 x 2) x ( 347 + 125)e(a x 7 + a x 8 – a x 15) : (1 + 2 + 3 + ........ + 10)f.58 – 58 x (6 + 54 – 60)g.32 + 63 x a x ( a x 1 – a : 1) + 32 x 8 + 32h.(1 + 2 + 3 + 4 + .... + 9) x (21 x 5 – 21 – 4 x21)i.(9 x 7 + 8 x 9 – 15 x 9) : (1 + 3 + 5 + 7 + ........+ 17 + 19)k.(2 + 4 + 6 + 8 + ... + 20) x (56 x 3 – 72 : 9 x 21)
Đọc tiếp
a .(18 – 9 x 2) x (2 + 4 + 6 + 8 + 10)
b.(7 x 8 – 56 ) : (2 + 4 + 6 + 8 + 112)
c. (2 + 125 + 6 + 145 + 112) x (42 – 6 x 7)
d.(12 x 6 – 12 x 4 – 12 x 2) x ( 347 + 125)
e(a x 7 + a x 8 – a x 15) : (1 + 2 + 3 + ........ + 10)
f.58 – 58 x (6 + 54 – 60)
g.32 + 63 x a x ( a x 1 – a : 1) + 32 x 8 + 32
h.(1 + 2 + 3 + 4 + .... + 9) x (21 x 5 – 21 – 4 x21)
i.(9 x 7 + 8 x 9 – 15 x 9) : (1 + 3 + 5 + 7 + ........+ 17 + 19)
k.(2 + 4 + 6 + 8 + ... + 20) x (56 x 3 – 72 : 9 x 21)
Tính nhẩm:
6 x 9 =
28 : 7 =
7 x 7 =
56 : 7 =
7 x 8 =
36 : 6 =
6 x 3 =
48 : 6 =
6 x 5 =
42 : 7 =
x 5 =
40 : 5 =
A = (a x 7 + a x 8 - a x 15) : (1 + 2 + 3 + ........ + 10)
B = (18 - 9 x 2) x (2 + 4 + 6 + 8 + 10)
x = 1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9 + 10 .
x = 2 + 4 + 6 + 8 + 10 + 12 + 14 + 16 + 18 + 20 .
x = 1 + 3 + 5 + 7 + 9 + 11 + 13 + 15 + 17 + 19 .
Tính nhẩm9 x 5 63 : 7 8 x 8 5 x 7 8 x 7 3 x 8 40 : 5 5 x 5 7 x 5 7 x 8 6 x 4 45 : 9 7 x 7 35 : 5 56 : 8 2 x 8 81 : 9 9 x 9 35 : 7 56 : 7
Đọc tiếp
Tính nhẩm
9 x 5 =
63 : 7 =
8 x 8 =
5 x 7 =
8 x 7 =
3 x 8 =
40 : 5 =
5 x 5 =
7 x 5 =
7 x 8 =
6 x 4 =
45 : 9 =
7 x 7 =
35 : 5 =
56 : 8 =
2 x 8 =
81 : 9 =
9 x 9 =
35 : 7 =
56 : 7 =
(2 điểm) Tính
a) 5 x 5 + 18
b) 5 x 7 + 23
c) 7 x 7 x 2
d) 15 – 6 x 2
Tính nhanh
A = (a x 7 + a x 8 - a x 15) : (1 + 2 + 3 + ........ + 10)
B = (18 - 9 x 2) x (2 + 4 + 6 + 8 + 10)