小学数学四则运算——简便运算大汇总 简便运算 4 31+3.2+5 32+6.8 25×(8×0.4)×1.25 7154-(2154- 231) (1211+187+ 245)×72 93.5÷3 21÷ 72 1125-997 998+1246+9989 (8700+870+87)÷87 125×8.8 1.3+4.25+3.7+3.75 17.15-(3.5-2.85) 3.4×99+3.4 4.8×1.01 0.4×(2.5÷73) (1.6+1.6+1.6+1.6)×25 ( 94+65-187)÷ 361 71100257 12.3-2.45-5.7-4.55 97÷2 51+115× 92 0.125×0.25×64 64.2×87+0.642×1300 78×36+7.8×741-7 54 2113×17+1217×8 87× 21+0.125× 21+0.5 2.42÷ 43+4.58× 311-4÷3 25÷100 2 62 5 4.25-3 65-(2 61-1 43) 3.8÷3.9+3.9÷0.1+0.1÷3.9 12.1-(1 51+ 2 11)×105 )3 7.12 5.8(6 3.97 5.4 )3 8.64 8.2(1 7.34 8.7 511)9518.3(957 416 6 6 6 17 9 07 9213 3 3 3 8 7 7.21 1 1 1.07.09 9 9 9.0 3.6 72.10 9.13 6 8.5 62.10 8.14 8 5269.3 7522 5533 2.33.1 98.1 68.6 5.1 86.6 78.5 15.8 18.1 55.8 1 3.5 41 3 52.4 22 3 51.1 22 3 5 4 1 2 33 4 1 22 3 4 11 2 3 4 8 1 2 4 66 8 1 2 44 6 8 1 22 4 6 8 11 2 4 6 8 34 -(15 + 13 )× 98 25 × 34 - 12 ÷4 58 ×[1÷( 34 + 13 )] [ 16 -(514 - 13 )]× 79 57 + 98 × 59 + 38 1 - 58 ÷ 2528 - 310 14 × 37 + 47 ÷4 5 -( 67 ÷ 314 + 613 ) 435252 12614121 15141781714159 10713151321 425 -(2.5+1.9)× (0.5-0.5) 425 -2.5+1.9× (0.5-0.5) 425 -2.5+1.9× 0.5-0.5 [425 -(2.5+1.9× 0.5)]-0.5 [425 -(2.5+1.9) ×((0.5-0.5) [425 -(2.5+1.9) × 0.5]-0.5 1213 -412 -214 -518 -12.5% 0.125× 34 +18 × 8.25+12.5% (78 +1316 )÷ 1316 2.5× 37 × 0.4× 213 15 314 -2.25-734 89 × [1516 +( 716 -14 )÷ 12 ] 10× [(45 -0.5) ÷ 37 ] (2.7-4.25× 25 )÷ 2.8× 47 1.25+114 × 7.4+125%÷ 58 10-4.68÷ 7.2+0.05 157 × (5...