Question

用递等式计算，能简算要简算。3.2x2.4+32x0.76 14.3÷1.1-1.8 0.76×9

用递等式计算，能简算要简算。3.2x2.4+32x0.76
14.3÷1.1-1.8
0.76×99
18.48÷(3.94+4.86)

Answer 1

解：14.3÷1.1-1.8=（11+3.3）÷1.1-1.8
=10+3-1.8
=10+1.2+1.8-1.8
=11.2
0.76×99=0.76×（100-1）
=76-0.76
=75+1-0.76
=75.24
18.48÷(3.94+4.86)

=18.48÷（4-0.06+4.8+0.06）
=18.48÷8.8
=（18+0.48）÷8.8
=（17.6+0.4+0.48）÷8.8
=（17.6+0.88）÷8.8
=2+0.1
=2.1

Answer 2

3.2×2.4+32×0.76
=3.2×2.4+3.2×7.6
=3.2×（2.4+7.6）
=3.2×10
=32
14.3÷1.1-1.8
=13-1.8
=11.2
0.76×99
=0.76×（100-1）
=0.76×100-0.76×1
=76-0.76
=75.24
18.48÷（3.94+4.86）
=18.48÷8.8
=2.1

Answer 3

=3.2×2.4+3.2×7.6
=3.2×（2.4+7.6）
=3.2×10
=32

追答

=13-1.8
=11.2

=0.76×100-0.76
=76-0.76
=75.24

追问

0.79x99

追答

=0.79×100-0.79
=79-0.79
=78.21

=18.48÷8.8
=2.1