计算:(1)-12+13-(9-18)(2)5 1 5 -[2 1 6 +(-4.8)-(-4 5 6 ) ](3
计算:(1)-12+13-(9-18)(2)515-[216+(-4.8)-(-456)](3)5+3×(-2)3+33(4)30÷(15-16)...
计算:(1)-12+13-(9-18)(2)5 1 5 -[2 1 6 +(-4.8)-(-4 5 6 ) ](3)5+3×(-2) 3 +3 3 (4)30÷( 1 5 - 1 6 )
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(1)-12+13-(9-18) =-12+13-(-9) =-12+13+9 =-12+22 =10; (2)5
=5
=5
=10-7 =3; (3)5+3×(-2) 3 +3 3 =5+3×(-8)+27 =5-24+27 =32-24 =8; (4)30÷(
=30÷
=30×30 =900. |
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