BLANK NUMBER LINES - BUMPER PACK

30 blank write-on, wipe-off number lines. Made from sturdy vinyl, the lines offer the opportunity for a variety of addition and subtraction exercises. Contains 10 ? 0-10 (45 ? 550mm), 10 ? 0-20 (45 ? 550mm) and 10 ? 0-100 (45mm ? 1.1m) number lines.