一、 解方程 二、 脱式计算 (1) 10÷X=4 (2) X-0.8-7=14.2 (3) 9+X+7=20.5 (1)50.16÷2.4-0.37×2.8 (2)1.25+7.5×(36.4÷4) (4) 4.5÷1.8+X=12 (5) 4X-12=48 (6) 5X+4=24 (7) X ÷9-0.7=8.3 (8) 6X+3×0.7=4.8 (9) 3.5X-1.8×5=5 (10) 3.6×1.3-9X=0 (11) (3-X) ÷2=0.1 (12) 4(X+1.2)=12 (13) (X+4.5) ×6=31.8 (14) 2.3X+1.7X=13+1 (15)X-0.5X=1.3 (16)X+0.8X=6.48 (17) 3.5X-X=17.5 (18) (4X-0.32) +1.6=2.08 (3)9.7+23.8÷3.4 (5)(190-56.4÷0.3)×0.45 (7)2.3×36+65×2.3-2.3 (9)(203.4+72.2) ÷(1.3×0.2) (4)7.3+12.8-2.8×2.3 6)5.68÷[0.4×(28.7-26.2)] (8)67.3×0.58+4.2×6.73 (10)86.4 ÷0.24×0.25 ( 三、 简便运算 (1)39.5×99+39.5 (2)26.9×0.48÷2.69 (11)1.25×88 (12)9.8+99×9.8 (3)7.8×9.9 (5)2.3×36+65×2.3-2.3 (7)67.3×0.58+4.2×6.73 (9)12.5×3.2 (4)1.25×3.2×2.5 (6)12.5×0.99 (8) )26.4×3.6-3.6×16.4 (10)4.2×7.8+2.2×4.2 (13)2.56×28+27×2.56+2.56×45 (14)2.5×1.25×0.32 (15)6.4×101 (16)(0.76+0.76+0.76+0.76)×2.5 (17)0.69×99 (18)(2.5×17) ×4 (19)320÷12.5÷8 (20)(1.25+0.125) ×8 本文来源:https://www.wddqw.com/doc/55d93b7858fb770bf78a55f1.html