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北师大版数学四年级下册口算练习
0.2 + 0.3 = 1.5 + 0.4 = 5.5 + 4.3 = 2.5 + 3.2 = 0.8 + 0.2 =
0.4 + 0.6 = 2.4 + 3.5 = 4.6 + 5.1 = 3.4 + 2.6 = 3.3 + 2.7 =
0.5 + 0.5 = 3.7 + 2.1 = 5.2 + 3.2 = 6.5 + 0.5 = 8.1 + 0.8 =
1.6 + 1.3 = 5.2 + 4.8 = 3.9 + 2.8 = 8.3 + 4.1 = 3.8 + 1.6 =
1.4 + 2.8 = 1.5 + 2.8 = 1.8 + 2.7 = 2.8 + 2.2 = 5.8 + 4.2 =
3.9 + 1.2 = 1.7 + 0.8 = 9.2 + 1.2 = 3.7 + 6.3 = 2.8 + 3.3 =
