北师大小学四年级数学下册脱式计算
河海大学文天-外出学习心得体会
54×(3.94+6.86)（3.2+0.12）×0.8
0.175×0.25×4
8.25+1.55=
1.8×0.25+4.2
28.7-17.9+4.5 2.4
10－2.45=
12×(15.4-12.2) 97.3－2.25=
3.7+2.36=
×[0.3×(8-6.5)]
0.4×3-6.18×99+0.47.8+4.56+2.2
5.01-
1.9+4.99 12.7+12.5×5
11.65－7.39=
3.6×4-2.5 0.65
1.44×3.98=
90×(3.6-1.8)10－3.14=
×6.4-0.65×5.4 78
1.36×0.8=
3.6+5.8-1.2×5
0.36×0.25×0.4×[(6.1-4.6)×0.8]8.5×5.67－7.5×5.67
1.6×[(1.8+1.95)-2.5] 4.5－1.14+1.5－1.24
1.3×0.25=
6.2+3.5×25×4 7.32
4.8×0.25=
1.25×32 0.561.44×3.98=
－4.37×0.9 4.05
1 5
4.8×1.2=
＋3.48＋0.44＋6.52
2.8+×0.5+0.81（2.25＋27.5×1.5）5.8×7.6＋7.6×4.2
145.3－58.6－41.4 [（5.1－3.6）÷0.8－1]×0.09
9.8×0.5=
0.5×4+0.5×6
2.42×1.1=
2.6×(0.175÷0.25) 70.89.8×1.3=
7.5－2.3×0.4）-0.2 5 2.16+0.9
3.14×1.5=
－1.25－1.75 (8×3＋0.8)×1.25（
9.4×[0.96÷(5.4÷0.9)] 2.125×1.5+7.875×1.5
0.7×101－0.7
0.12×50=2.6×0.5=
0.125×4.7×8
12.5－1.68－2.32 567
9.6×0.8=3.25×1.8=
19.6÷﹝0.48÷（5.4÷0.9）﹞1.9
2×（2.3+10.5÷15）÷20÷5÷﹝0.6×（8-6.5）﹞
187.2×9.94.7
5×99＋4.75 70.8－1.25－1.75
0.7×9.32=1.87×2.3=
3.54×0.29－0.29×2.541.25×32×2.5
0.15×0.63=1.8×0.85=
93÷0.31÷34.81＋8.3＋5.19＋11.11.6×3.2－3.2
2.5×（8＋0.4）138÷0.25÷0.4125×8.80.45×98
33.87+16.89=
2 5
（37.26－6.01）×0.4＋5.5 2.38×0.5＋5.62÷2
3.8+3.54=
51.8－4.8×（2.03－0.18）10.21-3.85=
15.8
3.05－2.9=
1.25×32×2.5＋4.2×10.5
1.6×3.2－3.29.43－(8.65+0.40)
8－7.23=
4.6－1.75+2.08
85－34.7=
4.28+0.53－3.374.6+12.3+5.8
3.8+3.54=
5－(4.19－2.83)7.41
0.7×7.8=
3.2+1.27－2.4915－(1.3+3.9)－(2.96+3.04)
1.54
+2.08+3.629.5+4.85－6.365.6+2.7+4.44.6－(1.75+2.08)
4.8×1.2=
4.02－3.5+0.98
2.13×4=
2.6+1.4×30.32×0.8=
70.8－1.25－1.75
3
5
4.8×0.3=
(8+0.8)×1.255－4.19+2.83
2.5×0.6－1.8×0.5
2.5×2.8×4
9.34×1.4=
1.83+3.79+0.17
1.87×2.3=
10―0.34―0.662.5×13+0.9
0.7×9.32=
22－1.6×7
0.15×0.63=
12.8+2.04×9.50.25×13.7×0.4
0.89×4.8+0.89×5.2
6.15×9.4－42
4.5×3.6+5.2×0.354.5×0.9+5.5×0.935.7+14-30.8
3.7+2.36=10.2－8.75=
5.4÷（2.7×4）9.4×[0.96÷(5.4÷0.9)]
9.8×1.3=654×0.9=
1.6×(2.25+10.5÷1.5)90÷(3.6－1.8)52÷6.5+26×0.37
3.4×7.8÷3.90.36÷[(6.1―4.6)
×0.8]54÷(3.94+6.86)0.175÷0.25×4
2.13×4=
4
5
(3.2+0.12)÷0.8
3.25×1.8=
96×(15.4－12.2)4.8×0.3=
0.175÷0.25×0.4
4.8×1.3=
2.4×3-0.1828.7÷7+4.5× [0.3×(8－6.5)]9
7.8+4.56+2.2
15.4+2.97=
3.6×4－2.5
8.25+1.55=
2.5×2.8×412.7+12.5×50.4×99+0.4
5.94+10.7=
0.65×6.4－0.65×5.45.01－1.9+4.99
7.3－2.25=
2.5×13+0.90.25×13.7×0.4
5
5