987-(287+135)
478-256-144
672-36+ 64
36+64-36+64
487-287-139-61
399+598
2000-368-132
473+79-63
①(460﹣180)+225÷15
②52+48×40÷5
③600÷25×4
④225+463+275+137
⑤200÷[(172﹣72)÷25]
⑥47×28+72×47
①307+928÷29
②127+348+473
③962-501
④678-239-261
⑤48×(87+223)
⑥156-37+44
①
②36×()
③
④
⑤3.24×0.76+3.24×0.24
⑥
①3.86+6.4+2.14+7.6
②5.2÷0.32﹣0.12
③()×15
⑤
①250-250÷25×2
②18÷ ×
③5.2÷0.4÷2.5
④(34- )÷17
⑤4.3×1.75-1.75+ ×6.7
⑥ ×[(72.8-69.6)÷ ]