无
*注意事项:
322-199= 1.87+5.13= 2.5×2.4= × ÷ × =
( ): = ÷ = -( - )=
0.32-0.23= 4.9×8.1≈ 23.9÷8≈
①2.8+5 +7.2+3
②9 ×4.25+4 ÷6
③2.5×3.2×1.25
④75.3×99+75.3
⑤23.46-6.57-3.43
⑥ ×8.3-0.3×62.5%
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