一张长12分米,宽8分米的长方形纸,做成底3分米,高2分米的直角三角形,最多可以做多少个?
用竖式计算.2.5×44= 64.8÷18=14.3×38= 1.69÷26=
32= 0.2×0.4= 6÷0.6= 0.12= 0.81÷0.9= 1.52= .
口算0.6×5= 300×6= 1.2÷3= 80﹣23=3.2×3=19×4= 0.07×6= 100÷4= 4.5÷3=
7.89×4.27 28.56÷5.1 102.6÷3.8.
0.9×0.08= 6+14.4= 24÷0.04= 3.2×7÷3.2×7=0÷3.8= 0.77+0.33= 7÷1.4= 187.7×11﹣187.7=7.2÷8×4= 400÷125÷8= = ()×12=1﹣= 2.34﹣2.3= 1.9×4×0.5= 67.5+0.25=