Question

数学简便计算能简便的简便9.54＋2.4×3.61.25×3.2×2.59.86－（2.7＋4.86）7.96÷.125

Answer 1

1. 9.54+2.4*3.6

=9.54+8.64

=18.18

2. 1.25*3.2*2.5

=1.25*(0.8*4)*2.5

=(1.25*0.8)*(4*2.5)

=1*10

=10

3. 9.86-(2.7+4.86)

=9.86-4.86-2.7

=5-2.7

=2.3

4. 7.96/125/8

=7.96/(125*8)

=7.96/1000

=0.00796

5. 4.8/(1.2+0.8)

=4.8/2

=2.4

6. 9.8*1.3+0.98*87

=9.8*1.3+(0.98*10)*(87/10)

=9.8*1.3+9.8*8.7

=9.8*(1.3+8.7)

=9.8*10

=98