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234乘以98除以49巧算怎么做

=234×(98÷49) =234×2 =468

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233+67×15=233+1005=1238, 234×98÷49=234×(98÷49)=23

凑百计算。

=906+234-555 =1140一600十45 =540+45 =585

234-34×4巧算 解: 234-34×4 =234-34-34×3 =200-102

234+57-148 =234+(66-9)-148 =(234+66)-(9+148) =3

234+66X8 =234+66+66X(10-3) =300+660-198 =960-20

2.34×57×10+234×43÷10 =23.4×57+23.4×43 =23.4×(57+

234+58+142+66 =(234+66)+(58+142) =300+200 =500

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