问题 解答题

简便计算.

25×32

73+141+27+69

258-35

560÷16

598+265

25×(3×4)×9.

答案

25×32

=25×(4×8)

=25×4×8

=100×8

=800

73+141+27+69

=(73+27)+(141+69)

=100+210

=310

258-35

=258-(38-3)

=258-38+3

=220+3

=223

560÷16

=560÷(8×2)

=560÷8÷2

=70÷2

=35

598+265

=600-2+265

=600+265-2

=865-2

=863

25×(3×4)×9

=25×3×4×9

=(25×4)×(3×9)

=100×27

=2700

单项选择题
单项选择题