213+199= 52-0.8= 12.5××0.08= 101×45=
180÷6= += ÷3= ×=
6﹣3.3= 2.2+3.57= ﹣= 39.5÷8≈(估算)
0.125×4= ×12= := 8×÷8×=
0.125×8= 4.5÷5= 3.55+2.45= 6297÷9≈
299×7≈
(12.6+3.24÷3)×0.5
8.5×1.6﹣3.6÷0.75