Abacus on Case
Abacus
Abacus and its shadow
Abacus against black background.
Wooden abacus against black background.
Child using an abacus
机の上に置かれたそろばんと教室
Small girl with abacus on white
教壇に置かれたそろばんと教室
Abacus and toys on DIY shelves hanging on leather strips
Mathematics equipment
Boy learning abacus at home
Calculator paper and broken pencil
Abacus on white background
Calculator
Marker pen and abacus
Abacus and calculator
Abacus sitting on a tabletop.
Bedroom
Entryway of Home
Front stoop of house
Fine china on table in luxury dining room
そろばん
帳場に置いた算盤
ロンドンのアパートのベランダ
ロンドンの高級アパート
Woman using calculator
五つ玉のそろばん
Bamboo crafts calculator
Slide rule
High Angle View of Child's Hands on White Toy Calculator
educational concept, selective focus on writing part of red pencil
Logarithmic slide rule
Abacus, close-up
算数の授業中の机
Empty business auditorium
Boy calculating with colorful abacus at home
Smiling boy learning abacus at home
Senior woman holding abacus on table
Double doors open to master bedroom
Girl playing with abacus
Copper abacus
Young girl learning on abacus
Girl with abacus on white
Color of jingdezhen porcelain
Still life the abacus and books
Close-up of Abacus
置物が並んだ壁の棚
Rope and Cleat
5つ玉算盤
Church of saint germain des pres.
Geometry instruments
educational concept, selective focus on writing part of pencil
doing math, selective focus on nearest part of pencil
calculation concept with pencil and notebook, focus on center of photo
writing red pencil in closeup, selective focus on center
writing yellow pencil in closeup, selective focus on center
Abacus, X-ray
School things in class room
Student doing geometry
Mathematical equipment
math items, selective focus on nearest part of pencil
selective focus on nearest parts of some yellow pencil
Calculator on grid gray background
Calculator and papers
Array of spectral lights
Geometry set
Protractor on white background, close up
Ruler set on white background, close up
Pair of compasses on white background, close up
Ruler on white background, close up
机の上の文具
ロンドンのアパートの窓
ロンドンのアパートの玄関
Bookstore
Gun shaped ruler and pen on paper
Colourful abacus for mathematics and learning
Household flexible rule
copper
Baby boy playing with abacus style plastic toy
Boy counting on an abacus
Young woman with gray eyes behind abacus
Cute baby doing mathematics on blackboard
Modern kitchen in luxury highrise apartment
Fractal pattern and time travel
Abacus copper
pension
高層マンション
Frog shaped stapler and pen on paper
Abacus with grey wooden frame and movable black-and-white beads isolated vector illustration on white. Cartoon style calculating tool. Counting Frame Isolated Illustration on White
教壇に置かれたそろばんと黒板
Provide for the aged
Girl studying
financial
Modern loft staircase
潘家園旧貨市場
計算機
Kitchen with Groceries
Life taste
focus on pen, special photo toned f/x
special photo toned f/x, focus point on the finger
Mathematics
Mathematics symbol
Angle in standard position
Standard lettering of a triangle
Representative trigonometric functions
Cartesian and polar coordinates
Axis rotation
Trigonometry of a circle
Triangle inscribed in a circle
Mathematics symbols