7.2×25％＋2.8×25％ 等于多少、?
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7.2×25％＋2.8×25％等于多少、?7.2×25％＋2.8×25％等于多少、?7.2×25％＋2.8×25％等于多少、?7.2×25％＋2.8×25％=(7.2＋2.8)×25％=10×25％=
7.2×25％＋2.8×25％ 等于多少、?
7.2×25％＋2.8×25％ 等于多少、?
7.2×25％＋2.8×25％ 等于多少、?
7.2×25％＋2.8×25％
=
(7.2＋2.8)×25％
=10×25％
=2.5
7.2×25％＋2.8×25％=2.5
7.2×25％＋2.8×25％
=0.25×(7.2+2.8)
=0.25×10
=2.5
7.2×25％＋2.8×25％
=（7.2+2.8）×25%
=10×0.25
=2.5
7.2×25％＋2.8×25％=2.5
（7.8+2.5）×25%=2.5
7.2×25%+2.8×25%
=（7.2+2.8）×25%
=10×25%
=2.5