mk bt làm mỗi 1 câu thui thông cảm
B) 37 x 62 + 37 x 38
37 x ( 62+38)
37 x 100
3700
hok tốt
a, 59 + 532 + 267 + 268 + 733
= 59 + ( 532 + 268 ) + ( 267 + 733 )
= 59 + 800 + 1000
= 859 + 1000
= 1859
b, 37 × 62 + 37 × 38
= 37 × ( 62 + 38 )
= 37 × 100
= 3 700
c, ( 1356 + 845 ) - ( 356 + 645 )
= 1356 + 845 - 356 - 645
= ( 1356 - 356 ) + ( 845 - 645 )
= 1000 + 200
= 1 200
a, 59 + 532 +267 + 268 + 733
= 59 + ( 532 + 268 ) + ( 267 + 733 )
= 59 + 800 + 1000 = 1859
b, 37 × 62 + 37 × 38
= 37 x ( 62 + 38 )
= 37 x 100 = 3700
c, ( 1356 + 845 ) - ( 356 + 645 )
= ( 1356 - 356 ) + ( 845 - 845 )
= 1000 + 200 = 1200
d,4 × 37 × 25 × 3 × 7
= ( 4 x 25 ) x ( 37 x 3 x 7 )
= 100 x 777 = 77700