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共3个回答
热心网友
16.2 × 99 + 16.2
= 16.2 × (99 + 1)
= 16.2 × 100
= 1620
( 2.375 + 0.625)× 0.28
= 3 × 0.28
= 3 × (0.3 - 0.02)
= 3 × 0.3 - 3 × 0.03
= 0.9 - 0.09
= 0.81
- 2.6 × 0.5
= - 1.3
= - 1 - 0.3
= 63 - 0.3
= 62.7
17 / 20 + 1 / 10 - 9 / 20
= (17 / 20 - 9 / 20)+ 2 / 20
= 8 / 20 + 2 / 20
= 10 / 20
= 1 / 2
【俊狼猎英】团队为你解答
热心网友
62.7
热心网友
16.2*(99+1)=1620
3*0.28=0.84
-1.3=62.7
20/17-9/20+1/10=8/20+1/10=4/10+1/10=5/10=1/2
热心网友
16.2 × 99 + 16.2
= 16.2 × (99 + 1)
= 16.2 × 100
= 1620
( 2.375 + 0.625)× 0.28
= 3 × 0.28
= 3 × (0.3 - 0.02)
= 3 × 0.3 - 3 × 0.03
= 0.9 - 0.09
= 0.81
- 2.6 × 0.5
= - 1.3
= - 1 - 0.3
= 63 - 0.3
= 62.7
17 / 20 + 1 / 10 - 9 / 20
= (17 / 20 - 9 / 20)+ 2 / 20
= 8 / 20 + 2 / 20
= 10 / 20
= 1 / 2
【俊狼猎英】团队为你解答
热心网友
62.7
热心网友
16.2*(99+1)=1620
3*0.28=0.84
-1.3=62.7
20/17-9/20+1/10=8/20+1/10=4/10+1/10=5/10=1/2