21.5×0.8921.5 54.5÷1.654.5
5.2÷0.25.2 5.88×1.15.88÷1.1
4.6×1546×1.5 73.6÷0.173.6×10
0.07×0.8= 1.7×0.03= 0.16×0.5= 4.5×0.03=
0.72÷12= 5.2÷13= 0.7×1.1= 9.6÷0.6=
0÷3.68= 0.48÷0.03= 2.5×8= 2.33×0.2×5=
①28×2.08≈
②0.72×0.56≈
③0.39×2.15≈
④4.86÷3.8≈
⑤9.3÷0.45≈
⑥4.64÷1.8≈