用简便方法计算:1.29+3.7+0.71+6.3 528×78+472×78 &nb...
用简便方法计算:1.29+3.7+0.71+6.3528×78+472×7846.5×99+46.5125×89×812.37-5.32-4.6812.5×(0.8+8)...
用简便方法计算:1.29+3.7+0.71+6.3 528×78+472×78 46.5×99+46.5125×89×8 12.37-5.32-4.68 12.5×(0.8+8)
展开
1个回答
展开全部
①1.29+3.7+0.71+6.3, =(1.29+0.71)+(3.7+6.3), =2+10, =12; ②528×78+472×78, =(528+472)×78, =1000×78, =78000; ③46.5×99+46.5, =(99+1)×46.5, =100×46.5, =4650; ④125×89×8, =125×8×89, =1000×89, =89000; ⑤12.37-5.32-4.68, =12.37-(5.32+4.68), =12.37-10, =2.37; ⑥12.5×(0.8+8), =12.5×0.8+12.5×8, =10+100, =110. |
推荐律师服务:
若未解决您的问题,请您详细描述您的问题,通过百度律临进行免费专业咨询