Switch accurately among all four keypad operators in realistic numeric expressions.

Read the full expression, enter it in source order, and use Enter only at the record boundary.

练习输入: +, -, *, /

目标: 99.00% 准确率.

Mixed Operator Review Guided Entry: 125+75 480-96 24*18 720/12 1500+625 4096-1088 75*16 8750/25

Mixed Operator Review Accuracy Review: 248+752 960-375 36*24 1440/16 2750+1250 8192-3072 125*48 15625/25