一 口算题。
3.4 + 2.6 = 2.7 + 3.5 = 1.04 + 2.36 =
1.03 + 2.07 = 4.2 - 0.09 = 2 - 0.37 =
5 - 0.75 = 3.25 + 1.5 = 4.02 + 2.8 =
4.9 + 0.2 = 1.01 - 0.9 = 2.9 + 0.01 =
11.1 - 9.3 = 12.4 + 3.6 = 1 - 0.55 =
3.8 + 2.72 = 7.2 - 0.7 = 3.6 - 1.24 =
4.9 + 7.31 = 2.01 + 0.09 = 2.36 - 1.7 =
6.23 + 2.77 = 0.35 - 0.12 = 3.9 + 2.03 =
0.58 + 3.5 = 2.7 + 6.3 = 26.28 - 5.1 =
3.54 - 1.8 = 0.28 + 0.14 = 28.36 - 3.3 =
6.38 + 5.62 = 3.97 + 4.02 = 3.16 - 2.89 =
2.44 + 4.86 = 17.4 - 4.04 = 0.45 + 5.47 =
3.4 + 2.6 = 2.7 + 3.5 = 1.04 + 2.36 =
1.03 + 2.07 = 4.2 - 0.09 = 2 - 0.37 =
5 - 0.75 = 3.25 + 1.5 = 4.02 + 2.8 =
4.9 + 0.2 = 1.01 - 0.9 = 2.9 + 0.01 =
11.1 - 9.3 = 12.4 + 3.6 = 1 - 0.55 =
3.8 + 2.72 = 7.2 - 0.7 = 3.6 - 1.24 =
4.9 + 7.31 = 2.01 + 0.09 = 2.36 - 1.7 =
6.23 + 2.77 = 0.35 - 0.12 = 3.9 + 2.03 =
0.58 + 3.5 = 2.7 + 6.3 = 26.28 - 5.1 =
3.54 - 1.8 = 0.28 + 0.14 = 28.36 - 3.3 =
6.38 + 5.62 = 3.97 + 4.02 = 3.16 - 2.89 =
2.44 + 4.86 = 17.4 - 4.04 = 0.45 + 5.47 =
答案:
6@@6.2@@3.4@@3.1@@4.11@@1.63@@4.25@@4.75@@6.82@@5.1@@0.11@@2.91@@1.8@@16@@0.45@@6.52@@6.5@@2.36@@12.21@@2.1@@0.66@@9@@0.23@@5.93@@4.08@@9@@21.18@@1.74@@0.42@@25.06@@12@@7.99@@0.27@@7.3@@13.36@@5.92
二 计算下面各题,怎样简便就怎样计算。
41.5 - 17.64 - 22.36 17.3 + 13.26 + 5.7 23.02 + 14.08 + 2.92
38 + 5.42 + 6.58 3.78 - 2.46 + 5.22 12.5 + 4.72 + 5.5 + 13.28
41.5 - 17.64 - 22.36 17.3 + 13.26 + 5.7 23.02 + 14.08 + 2.92
38 + 5.42 + 6.58 3.78 - 2.46 + 5.22 12.5 + 4.72 + 5.5 + 13.28
答案:
1.5@@36.26@@40.02@@50@@6.54@@36
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