口算:+= ﹣= +3= 2.6﹣1=5﹣= ﹣= += ﹣=2﹣﹣= +﹣= 1﹣(+)= +++=
直接写出结果.0÷4.8= ÷3= 1÷= ×=+= += 5﹣1.4﹣2.6= 0.4×8×25=
1.02﹣0.43= 1.25×8= (0.18+1)÷9= 7﹣2= 6.5×4×= (+)×4=1﹣﹣= 6.3×10%= 3.75﹣2﹣= ﹣÷5= 4﹣(3.8+)= 1﹣1÷3=(+)×35= 3×9+3= 5.38﹣(2.38+1.8)= 5﹣1﹣1.6= 14××= 4.4÷1=1.25××8= 7.2÷8×4= 5﹣= 10.8﹣3.9﹣4.1= 2.5﹣+1= 1++=
直接写出得数.(1)0.77+1.33= (2)437﹣198= (3)1﹣4÷9= (4)84×99=(5)12÷1.25= (6)÷2÷= (7)99×= (8)÷3.5=(9)(49﹣)×= (10)6÷(+)=
口算 1﹣+0.8= 7.4﹣(1+)= 1﹣﹣= 1.25×7×8= 12÷3=0.25×0.4= 4.4﹣3= 4÷0.25= 3÷10%= 11×6=+1÷2= ×(1﹣)= 2×0.75= ÷= 5÷25÷0.4=0.8××5= ÷×= (0.18+)÷9= ×÷×= ×÷=
直接写出得数.×15= 5.4×= ×7÷×7= =1÷1%= ÷= 0.75+0.75×99= 1.75﹣(+)=