简便计算 例简便计算 84 9+10+9 7+12+7+12 89+5-9 12+(8-12) 25-(19-25) 14-11-11 8-16-16 415453155516149195697 12-8+12-8 27+9.37+27+0.63 9×9＋9×9 7.8×6.9＋2.2×6.9 2.8×4.5+5.5×2.8 (1-2-4)÷4 27×5+27÷5 5.74×99＋5.74 0.25×16.2×4 12.5×0.96×0.8 111411315819516252.5×(3.8×0.04) (8×5.27)×1.25 12.5×0.4×2.5×8 0.25×36 0.125×72 1.25×2.5×32 95.2÷0.25÷4 6.25÷1.25÷0.8 7.09×10.8-0.8×7.09 5.4×11-5.4 3.5×9.9 4.8×10.1 4.8×7.8＋78×0.52 12.7×9.9＋1.27 练习 6345521252938104356711627411 5+10+5 11+7+7+11 11+9-9+11 13-11+13 9+(4+9) 7-(10-7) 15-9-9 7-15-15 -+- 27.3-1.2-8.8 ×＋× 8.56×2.5+1.44×2.5 36×+×54 15113111255128128 (11118+3–4)÷24 0.25×(16.2×4) (0.8×4.3)×1.25 3.76 9.7×99＋9.7 1431436661×813÷7+713 47.3×10.1-4.73 0.25×8.5×4 4.36×12.5×82.5×0.125×40×80 2.5×2.4 1.25×88 3.2×0.25×12.5 ÷0.4÷2.5 39÷1.25÷0.8 10.7×16.1-15.1×10.7 0.39×199 3.6×102 3.65×4.7－36.5×0.37 1.87×9.9＋0.187 本文来源：https://www.wddqw.com/doc/15d4274ef142336c1eb91a37f111f18582d00c68.html