一、口算。(10分) 10-2.65= 0÷3.8= 9×0.08= 24÷0.4= 67.5+0.25= 6+14.4= 0.77+0.33= 5-1.4-1.6= 80×0.125= 13÷3×= 77二简便运算 1134413(-)×12 1×2× 34×(2+) 125×8.8 46 3.4×99+3.4 17.15 79÷21525+11×9 0.125 三解方程: (1) 3.5X+1.8=12.3 4157-8.47-1.53 17×0.25×32 22.3 (5) X+25X=21 3456-334-456 -2.45-5.3-4.55 (6) 4215X+5X=2 (7) 3.6X÷2=2.16 (8) X+X= (2) 0.8X-4=1.6 23 (3) 5X÷2=10 (10) X-2=3510 74(4) X-0.25X=3 (11) 2X+7X=910 (9) X-2X=3510(12) 38+X=25 本文来源:https://www.wddqw.com/doc/71f3e543581b6bd97f19ea66.html