题目内容
180×3= | 530+190= | 280×4= | 380÷19= |
720-540= | 0÷313= | 366+0= | 120÷60= |
320+570= | 630÷30= | 850÷17= | 350×4= |
54×30= | 100-26= | 450×20= | 6000÷300= |
940-270= | 89×100= | 14×50= | 0.75+0.45= |
0.56×100= | 8.4×100= | 102.7÷1000= | 10÷100= |
0.91+1.25= | 10-0.76= | 3.99-0.9= | 0.567+4.44= |
98.4÷1000= | 0.705×100= | 0÷3.986= | 45.9+1= |
41×102= | 657-298= | 7.46+2.54= | 1-0.08= |
0×4.37= | 9.05×1000= | 20÷1000= | 10.8+2= |
399+167= | 6.87-3.25= | 0.25+0.75= | 0.78+0.22= |
400-35-65= | (25+125)×4= | 360÷18= | 0.54×100= |
8×39+8= | 1-0.2-0.8= | 65.8÷100= | 328-109= |
13×25×4= | 21+243+79= | 3600÷400= | 5+4.3+7.5= |
(16+64)×4= | 2.5×10= | 18×400= | 10-(2.3+2.7)= |
分析:本题根据小数与整数的加法,减法,乘法,除法的运算法则及四则混合运算的运算顺序计算即可.
“41×102”可将41拆分为40+1进行简算;
“657-298”、“399+167”、“328-109”可用凑整法进行简算;
“400-35-65”“1-0.2-0.8”可据一个数减去两个数等于减去这两个数的和的减法性质进行简算;
“21+243+79”可据加法交换律及结合律进行简算;
“(25+125)×4”“8×39+8”可据乘法分配律进行简算;
“13×25×4”可据乘法结合律进行简算.
“41×102”可将41拆分为40+1进行简算;
“657-298”、“399+167”、“328-109”可用凑整法进行简算;
“400-35-65”“1-0.2-0.8”可据一个数减去两个数等于减去这两个数的和的减法性质进行简算;
“21+243+79”可据加法交换律及结合律进行简算;
“(25+125)×4”“8×39+8”可据乘法分配律进行简算;
“13×25×4”可据乘法结合律进行简算.
解答:解:
180×3=540 | 530+190=720 | 280×4=1120 | 380÷19=20 |
720-540=180 | 0÷313=0 | 366+0=366 | 120÷60=2 |
320+570=890 | 630÷30=21 | 850÷17=50 | 350×4=1400 |
54×30=1620 | 100-26=74 | 450×20=9000 | 6000÷300=20 |
940-270=670 | 89×100=8900 | 14×50=700 | 0.75+0.45=1.2 |
0.56×100=56 | 8.4×100=840 | 102.7÷1000=0.1027 | 10÷100=0.1 |
0.91+1.25=2.16 | 10-0.76=9.24 | 3.99-0.9=3.09 | 0.567+4.44=5.007 |
98.4÷1000=0.0984 | 0.705×100=70.5 | 0÷3.986=0 | 45.9+1=46.9 |
41×102=4182 | 657-298=359 | 7.46+2.54=10 | 1-0.08=0.92 |
0×4.37=0 | 9.05×1000=9050 | 20÷1000=0.02 | 10.8+2=12.8 |
399+167=566 | 6.87-3.25=3.62 | 0.25+0.75=1 | 0.78+0.22=1 |
400-35-65=300 | (25+125)×4=600 | 360÷18=20 | 0.54×100=54 |
8×39+8=320 | 1-0.2-0.8=0 | 65.8÷100=0.658 | 328-109=219 |
13×25×4=1300 | 21+243+79=343 | 3600÷400=9 | 5+4.3+7.5=16.8 |
(16+64)×4=320 | 2.5×10=25 | 18×400=7200 | 10-(2.3+2.7)=5 |
点评:完成本题要细心,认真分析式中数据,能简算的要简算.
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180×3= | 530+190= | 280×4= | 380÷19= |
720-540= | 0÷313= | 366+0= | 120÷60= |
320+570= | 630÷30= | 850÷17= | 350×4= |
54×30= | 100-26= | 450×20= | 6000÷300= |
940-270= | 89×100= | 14×50= | 0.75+0.45= |
0.56×100= | 8.4×100= | 102.7÷1000= | 10÷100= |
0.91+1.25= | 10-0.76= | 3.99-0.9= | 0.567+4.44= |
98.4÷1000= | 0.705×100= | 0÷3.986= | 45.9+1= |
41×102= | 657-298= | 7.46+2.54= | 1-0.08= |
0×4.37= | 9.05×1000= | 20÷1000= | 10.8+2= |
399+167= | 6.87-3.25= | 0.25+0.75= | 0.78+0.22= |
400-35-65= | (25+125)×4= | 360÷18= | 0.54×100= |
8×39+8= | 1-0.2-0.8= | 65.8÷100= | 328-109= |
13×25×4= | 21+243+79= | 3600÷400= | 5+4.3+7.5= |
(16+64)×4= | 2.5×10= | 18×400= | 10-(2.3+2.7)= |