520＋490＝ 620－570＝ 1170－280＝
470＋580＝ 720－590＝ 580＋230＝
598＋204＝ 357＋448＝ 250＋52＋749≈
580+250-470 650+590-580
= =
= =
950－570+570 450－360+250
= =
= =
224－130+640 350－180+647
= =
= =
370＋160-280 350－160-190
= =
= =
762-314+218 700-557+344
= =
= =
503-239+247 712-536+524
= =
= =
460+280-350 630+290-470
= =
= =
980－570+490 450－360+580
= =
= =
294－130+270 350－180+480
= =
= =
370＋160-250 240－160+550
= =
= =
666-354+254 700-538+256
= =
= =
543-239+548 728-536+265
= =
580+250-470 650+590-580
=
二年级下册万以内加减法口算 (2) 来自淘豆网m.daumloan.com转载请标明出处.
