1、3.26×4.5+5.2×3.26+9.7×6.742、15.8×5.8+4.2×4.2+11.6×4.2

来源:学生作业帮助网 编辑:作业帮 时间:2024/04/28 21:14:53

1、3.26×4.5+5.2×3.26+9.7×6.742、15.8×5.8+4.2×4.2+11.6×4.2
1、3.26×4.5+5.2×3.26+9.7×6.74
2、15.8×5.8+4.2×4.2+11.6×4.2

1、3.26×4.5+5.2×3.26+9.7×6.742、15.8×5.8+4.2×4.2+11.6×4.2
1.3.26×4.5+5.2×3.26+9.7×6.74
=3.26x(4.5+5.2)+9.7×6.74
=3.26x9.7+9.7×6.74
=9.7x10=97
2.15.8×5.8+4.2×4.2+11.6×4.2
=4.2x(4.2+11.6)+15.8×5.8
=4.2x15.8+15.8x5.8
=15.8x10
=158

3.26x4.5+5.2x3.26+9.7x6.74=3.26x(4.5+5.2)+9.7x6.74=3.26x9.7+9.7x6.74=9.7x(3.26+6.74)=9.7x10=97
15.8×5.8+4.2×4.2+11.6×4.2
=15.8x5.8+(4.2+11.6)x4.2=15.8x5.8+15.8x4.2=15.8x(5.8+4.2)=158