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- 2026-04-2731-2.54-7.46=31-( + )
- 2026-04-27×15×=15××
- 2026-04-27×40=□○40-□○40=□
- 2026-04-27用简便方法计算． 100-54.28-25.72 1137+5911+347+1211 87×54+87×46 0.25×64×1.25．
- 2026-04-27计算:28-89÷811×911 16×23÷(45-815) [1-(14+38)]÷14 (47+12)×725．
- 2026-04-27能简算的要简算．(1)4-0.8÷4-0.8(2)19.98×37-199.8×1.9+1998×0.82(3)9.75+99.75+999.75+9999.75(4)9999×7+1111×37．
- 2026-04-27下面各题怎样简便就怎样算．(2429+1617)×18+1517213÷[1-(12+13)]4×0.8×2.5×12.5 ×4.6．
- 2026-04-27用简便方法计算． 1.7+5150+3.98, 17.625-(4.4+758) 3.35×6.4×2+6.7×3.6 0.25×48×1.25 3.34-5÷17-317×4 917-(117-12