First, class exercises.
3.56+4.54+6.44+5.46 5.03-0.25- 1.75
4.86+5.24- 1.86 8. 13+( 1.87-0.5)
23.7- 1.6-3.7-8.4 87.4-(2 1.25+ 17.4) -8.75
14.6-9.9 1.9+ 1.99+ 1.999 19.43-(6.72+ 1.43)
2.69- 1.35+3.3 1-2.65 17.28-3.86-6. 14+2.72
5.25+3.76-2.76+4.75 4.5+5.5-4.5+5.5
2 1.53-( 13.64-8.47) 28.49- 1. 1-2.47-6.43
7.34+2.5+2.66- 1.5 3.25+ 1.79-0.59+ 1.75
3.79- 1.225-(3.775-6.2 1) 27.38-5.34+2.62-4.66
Second, practice after class
4. 12+8.59+5.88+ 1.4 1 12.87- 1.34-2.66
2 1.53+4.87-2.53 15.2 1+(4.79-2.8)
12. 19-2.6-2. 19-3.4 109.72-(5.62+9.72)
2 1.3- 19.9 39.6-( 18.3 1+9.6) - 1.69
14.25-2.45+5.75-3.55 24.5 1-3. 14-6.86+4.49
4 1.25+5.87-3.87+4.65 1 1.5+8.5- 1 1.5+8.5
8. 13-( 12.25- 1 1.87) 34.34-2. 1-2.35-5.55
8 1.67+4. 17+4.33-2. 17 1.35+ 12.87- 1.37+8.65
15.5 1-3.334-(2.666-4.49) 2 1.62-4.35+8.38-5.65
Simple calculation of decimal multiplication and division
First, class exercises.
0. 125×3.69×8 (2.5-0.25) ×4 8.59× 10 1
0.36× 15.7-0.36× 13.7 5.64× 1.28+8.72×5.64
0.63× 199 60÷48 7.73×0.5+2.27÷2
4.37+99×4.37 10. 1×38.67-3.867 9.9÷5.5
8.63×25-0.063×250 9.3× 10. 1 3.99÷0. 125÷8
0.99×0.8 1+0. 1 1×9×0. 19 (5.23+5.23+5.23+5.23) ×25
0.25× 1.25×0.67×32 2.49×3.8+0.249×62
33.4 1÷4-3.4 1×0.25 54.8-0.3×0.3-3.9 1
(6.4+48) ÷0.8 15×9.7 2.5×(4+8) × 12.5
Second, practice after class
0.25×8×2. 12 ( 12.5- 1.25)×8 5.7× 18.34-57×0.834
3.87×4. 12+5.88×3.87 8.8÷5.5 3.25× 199
5.64+99×5.64 20. 1×35.22-3.522 5.2×20. 1
3.7× 1.63-0.37× 15.3 0.88×0.78+0. 1 1×0.22×0.8
2.5×(4.2 1+4.2 1+8.42) 1.25× 1.86×32×0.25
4.34×0.25+0.25×5.56+0.025 (7.2+54) ÷0.9
2.73×0. 125+7.27÷8 56.34÷2-6.34×0.5
1 1.43÷0.8÷ 12.5 12× 19.8 2 1.56-0.4×0.4-3.84
80÷32 7.56× 10 1 1.25×2.5×(8+4)