(1)2.6×(2.139÷9.3×6.2) =2.6×(2.3×6.2) =2.6×14.62 =37.076 (2)4.23×101-4.23 =4.23×(101-1) =4.23×100 =423 (3)76.3×27-76.3×17 =76.3×(27-17) =76.3×10 =763 (4)(8×5.27)×1.25 =8×5.27×1.25 =(8×1.25)×5.27 =10×5.27 =52.7 (5)2.3×30×1.25 =69×1.25 =86.25 (6)6.93×10.1 =6.93×(10+0.1) =6.93×10+6.93×0.1 =69.3+0.693 =69.993 |
(1)2.6×(2.139÷9.3×6.2)
=2.6×(2.3×6.2)
=2.6×14.62
=37.076
(2)4.23×101-4.23
=4.23×(101-1)
=4.23×100
=423
(3)76.3×27-76.3×17
=76.3×(27-17)
=76.3×10
=763
(4)(8×5.27)×1.25
=8×5.27×1.25
=(8×1.25)×5.27
=10×5.27
=52.7
(5)2.3×30×1.25
=69×1.25
=86.25
(6)6.93×10.1
=6.93×(10+0.1)
=6.93×10+6.93×0.1
=69.3+0.693
=69.993