\(=47\left(54-53-1\right)=0\)
\(\text{54}\times\text{4}7-47\times53-20-27\)
\(\text{=47}\times\left(54-53\right)-\left(20+27\right)\)
\(\text{=47}\times\text{1}-47\)
\(\text{=47}-47\)
\(=0\)
\(=47\left(54-53-1\right)=0\)
\(\text{54}\times\text{4}7-47\times53-20-27\)
\(\text{=47}\times\left(54-53\right)-\left(20+27\right)\)
\(\text{=47}\times\text{1}-47\)
\(\text{=47}-47\)
\(=0\)
Tính nhanh
(145 x 99 + 145 ) - ( 143 x 102 – 143 × 2 ) + 54 x 47 - 47 x 53 - 20 - 27
Tính nhanh (145 x 99 + 145 ) - ( 143 x 102 – 143 × 2 ) + 54 x 47 - 47 x 53 - 20 - 27
Tính nhanh :
(145 x 99 + 145) - (143 x 102 - 143 x 2) + 54 x 47 - 47 x 53 - 20 -27
Tính nhanh
A, (145 x 99 + 145 ) - (143 x 102 -143)
B, 54 x 47 x - 47 x 53 - 20 -27
Bài 2b,54 x 47 - 47 x 53 - 20 - 27 Bài 2c, 10000 - 47 x 72 - 47 x 28
bài 1 : tính nhanh
(145 x 99 + 145) - (143 x 102 - 143)
54 x 47 - 47 x 53 - 20 - 27
2 x 8 x 50 x 25 x 125
1. Tính bằng cách thuận tiện nhất
a) 6*1235*20-5*235*24
b) (145*99+145)-143*99-143
c) 54*47-47*53-20-27
d) 10000-47*74-47*26
e) 3457-27*48-48*73+6543
tính nhanh :
54 x47 -47 x53 -20-27
T ÍNH NHANH :
54 X47 - 47 X53 -20 -27
tinh
a, 8*427*3+6*573*4
b, 6*1235*20-5*235*24
c, (145*99+145)-(143*102-143)
d, 54*47-47*53-20-27
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