| 简便计算. 25×32 73+141+27+69 258-35 560÷16 598+265 25×(3×4)×9. |
25×32 =25×(4×8) =25×4×8 =100×8 =800 73+141+27+69 =(73+27)+(141+69) =100+210 =310 258-35 =258-(38-3) =258-38+3 =220+3 =223 560÷16 =560÷(8×2) =560÷8÷2 =70÷2 =35 598+265 =600-2+265 =600+265-2 =865-2 =863 25×(3×4)×9 =25×3×4×9 =(25×4)×(3×9) =100×27 =2700 |
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a.12×(4+25)[ ]
a. 47+(14×5)(1)35+65=
65+35=
35+65○65+35