仔细计算.①233×4-133②4.62+9.9+5.38+0.1③4×0.6+0.6÷14④36×(49-512)+15⑤34+(0.4-13)×4.5⑥0.9与0.2的差加上1除以1.25的商是多少?⑦13=1()+1()+1()(在括号里填上不同-六年级数学
题文
仔细计算. ①233×4-133 ②4.62+9.9+5.38+0.1 ③4×0.6+0.6÷
④36×(
⑤
⑥0.9与0.2的差加上1除以1.25的商是多少? ⑦
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答案
①233×4-133, =932-133, =799; ②4.62+9.9+5.38+0.1, =(4.62+5.38)+(9.9+0.1), =10+10, =20; ③4×0.6+0.6÷
=4×0.6+0.6×4, =0.6×(4+4), =0.6×8, =4.8; ④36×(
=36×
=16-15+15, =1+15, =16; ⑤
=
=
=
=1.05; ⑥(0.9-0.2)+(1÷1.25), =0.7+0.8, =1.5; 答:和是1.5. ⑦ |