"9×7减四十"...9×7减四十
"101×45减四十"...101×45减四十
"28×142减四十"...28×142减四十
"150×40减40+"...150×40减40+
"4×180减40-"...4×180减40-
"40×40减40+"...40×40减40+
"30×68减8×四十十等于几"...30×68减8×四十十等于几
"12×6减四十"...12×6减四十
"7×7减四十"...7×7减四十
"26×5减四十"...26×5减四十