(1)1020+270÷18-864, =1020+15-864, =171; (2)
=
=
=
(3)
=(
=(0.125+6.875)+1, =7+1, =8; (4)0.25×64×125%, =0.25×4×2×8×1.25, =(0.25×4)×(8×1.25)×2, =1×10×1, =20; (5)[
=[
=
=
(6)6.35×0.75+4.65×75%-
=6.35×0.75+4.65×0.75-0.75, =(6.35+4.65-1)×0.75, =10×0.75, =7.5. |