Question

5.8-10.6+4.2+9.6用简便方法计算

Answer 1

5.8-10.6+4.2+9.6用简便方法计算

原式
=5.8+4.2-(10.6-9.6)
=10-1
=9

3.4-5.8一4.2十6.6用简便方法怎么计算?

3.4-5.8一4.2十6.6
=（3.4+6.6）-（5.8+4.2）
=10-10
=0

5.8x3.33+4.2x3.33用简便方法计算

5.8×3.33+4.2×3.33
=3.33×（5.8+4.2）
=3.33×10
=33.3

5.8×98，用简便方法计算

5.8×98
=5.8×（100-2)
=5.8×100-5.8×
=580-11.6
=568.4

11.6*4.2+15.8*5.8+4.2*4.2这个算式怎么用简便方法计算

=(11.6+4.2)x4.2+15.8x5.8
=158.8x4.2+15.8x5.8
=15.8x(4.2+5.8)
=15.8x10=158

11.6*4.2+15.8*5.8+4.2*4.2
=11.6*4.2+4.2*4.2+15.8*5.8
=（11.6+4.2）*4.2+15.8*5.8
=15.8*4.2+15.8*5.8
=15.8*（4.2+5.8）
=15.8*10
=158

10.6-30÷7.5用简便方法计算

10.6-30÷7.5用简便方法计算
=10.6-4x7.5/7.5
=10.6-4
=6.6

15.27—(1.27 9.6)用简便方法计算。

15.27—(1.27 9.6)用简便方法计算。
15.27—(1.27 +9.6)
=15.27—1.27 -9.6
=14 -9.6
=14-9-0.6
=5-0.6
=4.4

15.8×5.8+4.2×4.2+11.6×4.2用简便方法算

15.8×5.8+4.2×4.2+11.6×4.2
=15.8×5.8+4.2×（4.2+11.6）
=15.8×5.8+4.2×15.8
=15.8×（5.8+4.2）
=15.8×10
=158