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3.3×2=2.4×0.5=0.6×0.9=0.2×0.3=
0.39+0.61=10-7.2=0.88+1.1=0.75×4=
11-1.5=4.48-4=7.8-0.8=2.8×5=
4×0.3=4×0.25=3.2+1.6=10.6-5.2=
0.32+1.68=8×125=7.28+7=0.8+39.2=
43+0.01=0.4×2=1.5×6=1×0.04=
1.53-0.5=1.5-0.6=0.3+1.5=95÷5=
0.65+4.35=14-7.4=11.2-9.8=4.4×2=
35-25=56-26=45+15=35-15=
38+28=15+25=12+12=47-27=
13+23=1-12=14+14=212+312=
14-0=610-510=1-23=0+56=
78-38=29+29=58-48=15+45=
0.9×125×8=5.75+1.37+4.25=0.43×10+5.7=62-2.8-1.2=
2.7×4+2.7×6=0.25×0.5×4=

解:3.3×2=6.6;2.4×0.5=1.2;0.6×0.9=0.54;0.2×0.3=0.06;
0.39+0.61=1;10-7.2=2.8;0.88+1.1=1.98;0.75×4=3;
11-1.5=9.5;4.48-4=0.48;7.8-0.8=7;2.8×5=14;
4×0.3=1.2;4×0.25=1;3.2+1.6=4.8;10.6-5.2=5.4;
0.32+1.68=2;8×125=1000;7.28+7=14.28;0.8+39.2=40;
43+0.01=43.01;0.4×2=0.8;1.5×6=9;1×0.04=0.04;
1.53-0.5=1.031.5-0.6=0.9;0.3+1.5=1.8;95÷5=19;
0.65+4.35=5;14-7.4=6.6;11.2-9.8=1.4;4.4×2=8.8;
35-25=10;56-26=30;45+15=60;35-15=20;
38+28=66;15+25=40;12+12=24;47-27=20;
13+23=36;1-12=-11;14+14=28;212+312=524;
14-0=14;610-510=100;1-23=-22;0+56=56;
78-38=40;29+29=58;58-48=10;15+45=60;
0.9×125×8=900;5.75+1.37+4.25=11.37;0.43×10+5.7=10;62-2.8-1.2=58.
2.7×4+2.7×6=27;0.25×0.5×4=0.5;

分析:这些题比较简单,有的直接口算得出,如3.3×2,43+0.01等;有的通过简算得出,如11-1.5=11-1-0.5=10-0.5=9.5,62-2.8-1.2=62-(2.8+1.2)=62-4=58,等.
点评:此题主要考查学生的口算能力,以及运用运算定律进行简单口算的能力.
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