脱式计算(能简便运算的要简便运算)①0.25×0.975×40 ②0.89×4.8+0.89×5.2③(8+0.8)×1.25 &nb.
脱式计算(能简便运算的要简便运算)①0.25×0.975×40②0.89×4.8+0.89×5.2③(8+0.8)×1.25④10-0.38-0.62⑤45.3×101-...
脱式计算(能简便运算的要简便运算)①0.25×0.975×40 ②0.89×4.8+0.89×5.2③(8+0.8)×1.25 ④10-0.38-0.62⑤45.3×101-45.3 ⑥1.25×0.25×8×0.4.
展开
1个回答
展开全部
①0.25×0.975×40
=0.25×40×0.975
=10×0.975
=9.75;
②0.89×4.8+0.89×5.2
=0.89×(4.8+5.2)
=0.89×10
=8.9;
③(8+0.8)×1.25
=8×1.25+0.8×1.25
=10+1
=11;
④10-0.38-0.62
=10-(0.38+0.62)
=10-1
=9;
⑤45.3×101-45.3
=45.3×(101-1)
=45.3×100
=4530;
⑥1.25×0.25×8×0.4
=(1.25×8)×(0.25×0.4)
=10×0.1
=1.
=0.25×40×0.975
=10×0.975
=9.75;
②0.89×4.8+0.89×5.2
=0.89×(4.8+5.2)
=0.89×10
=8.9;
③(8+0.8)×1.25
=8×1.25+0.8×1.25
=10+1
=11;
④10-0.38-0.62
=10-(0.38+0.62)
=10-1
=9;
⑤45.3×101-45.3
=45.3×(101-1)
=45.3×100
=4530;
⑥1.25×0.25×8×0.4
=(1.25×8)×(0.25×0.4)
=10×0.1
=1.
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