5.6*12.5的简便运算
12.5X5.6简便计算? -
12.5×5.6 =12.5×8×0.7 =100×0.7 =70 望采纳，
5.6×12.5 ＝0.7×（8×12.5）＝0.7×100 ＝70
12.5×5.6 =12.5×8×0.7 =100×0.7 =70 望采纳，
5.6×12.5 ＝0.7×（8×12.5）＝0.7×100 ＝70
12.5×5.6 =12.5×8×0.7 =100×0.7 =70
5.6*12.5 =0.7*8*12.5 =0.7*100 =70
12.5X5.6简便计算各题? -
巧算过程解析12.5×5.6 解题思路：四则运算规则(按顺序计算，先算乘除后算加减，有括号先算括号，有乘方先算乘方)即脱式运算(递等式计算)需在该原则前提下进行解题过程：12.5×5.6 =12.5×8×0.7 =100×0.7 =70
(5+0.6)*(12+0.5)=5*12+5*0.5+12*0.6+0.6*0.5=60+2.5+7.2+0.3=70
12.5X5.6用简便计算什么写? -
因为5.6=7×0.8，所以原式等于12.5×7×0.8运用乘法结合律改变运算顺序结果保持不变就有7×（12.5×0.8）7×10=70
(5+0.6)*(12+0.5)=5*12+5*0.5+12*0.6+0.6*0.5=60+2.5+7.2+0.3=70
12.5乘以5.6的简便运算 -
12.5乘以5.6 =12.5*8*0.7 =10*0.7 =7
12.5乘以5.6 =12.5*8*0.7 =10*0.7 =7