①122﹣36+64
=122﹣(36+64)
=122﹣100
=22 订正:①
②99×25
=(100﹣1)×25
=100﹣1×25
=75 订正:②
③720÷(8×3)
=720÷8×3
=90×3
=270 订正:③
①122﹣36+64
=122﹣(36+64)
=122﹣100
=22 订正:①
②99×25
=(100﹣1)×25
=100﹣1×25
=75 订正:②
③720÷(8×3)
=720÷8×3
=90×3
=270 订正:③
试题篮
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