Question

2.5乘以1.25简便计算

Answer 1

2.5乘以1.25简便计算

解：采用凑整法，
原式=2.5x1.25
=2.5x4x1.25x8÷（4x8）
=10x10÷32
=100/32
=25/8
=3又1/8

7.25乘以1.25+1.4乘以2.5的简便计算

7.25乘以1.25+1.4乘以2.5的简便计算
解：采用凑整法，
原式=7.25x1.25+1.4x2.5
=7.25x1.25x8÷8+1.4x2.5x4÷4
=7.25x10÷8+1.4x10÷4
=72.5÷8+14÷4
=9.0625+3.5
=12.5625

80.53乘以1.25简便计算

=80.53*(1+0.25)
=80.53+80.53*0.25
=80.53+20.1325=100.6625

1.48乘以1.25乘以3.4的简便计算

6.29

• 解析：

1.48×1.25×3.4

=0.74×2×1.25×2×1.7

=0.37×4×1.25×2×1.7

=(0.37×1.7)×(8×1.25)

=0.37×1.7×10

=3.7×1.7

=6.8-0.51

=6.29

0.85乘以0.32×1.25简便计算

0.85乘以0.32×1.25
=0.85×4×0.08×1.25
=3.4×0.1
=0.34

1.25乘以88的简便计算

1.25乘以88的简便计算
=1.25x8x11
=10x11
=110

1.2乘以1.25减0.2乘以1.25怎样简便计算

1.2 * 1.25 - 0.2 * 1.25 = 1.25* (1.2 - 0.2) = 1.25 * 1 = 1.25
满意请采纳

（1.25减0.125）乘以8简便计算？

=1.25×8-0.125×8
=10-1
=9
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简便计算：8加0.8乘以1.25

8+0.8x1.25
=8+1
=9

简便计算0.38乘以25 6.2乘以2.5

简便计算
0.38乘以25 十6.2乘以2.5
=2.5X(3.8+6.2)
=2.5X10
=25