Question

7.5╳0.43+0.75╳4.3用简便方法计算

7.5╳0.43+0.75╳4.3用简便方法计算

Answer 1

7.5╳0.43+0.75╳4.3用简便方法计算
=0.43×（7.5+7.5）
=0.43×15
=6.45

Answer 2

原式=7.5×0.43+7.5×0.43
=7.5×0.43×2=15×0.43=15×0.4+15×0.03
=6+0.45=6.45