图中，∠2的度数是∠1的多少倍？
直接写出结果﹣=，×1.2=，5﹣1﹣1.6=，÷=， 2×0=，÷9=，×12=，0.25×4=，÷=，×20%=．
直接写出得数+=﹣=+= 1﹣=+==+=﹣= 3﹣=+= 3÷7= 43=
直接写得数．+= 3﹣1.75=÷=×=×=÷=÷=×0+3=（+）×=
直接写出得数．+=﹣=×2=×=÷3×÷3== 12×=×14=÷4=+÷+=
直接写得数+= 3+1.75=÷=×=×=﹣=+=×0+3= （+）×=×÷×=
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﹣
=，
×1.2=，5﹣1
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