北师大三年级数学上册《小熊购物》练一练4.
50-5x8 7x6-30 93-3x9
=50-40 =42-30 =93-27
=10 =12 =66
8x9-34 20-2x6 46+4x7
=72-34 =20-12 =46+28
=38 =8 =74
北师大三年级数学上册《小熊购物》练一练4.
50-5x8 7x6-30 93-3x9
=50-40 =42-30 =93-27
=10 =12 =66
8x9-34 20-2x6 46+4x7
=72-34 =20-12 =46+28
=38 =8 =74